Reports of Human Infections with Variant Viruses

This page contains links to previous reports of human infections with variant influenza viruses that normally circulate in swine.

• Molecular evidence for interspecies transmission of H3N2pM/H3N2v influenza A viruses at an Ohio agricultural fair, July 2012. Article published online in Emerging Microbes and Infections (2012).
• MMWR, September 27, 2012: Influenza A (H3N2) Variant Virus-Related Hospitalizations – Ohio, 2012. MMWR 2012; 61(38);764-767.
• Flu Spotlight, September 7, 2012: H1N2 Variant Virus Detected in Minnesota
• Flu Spotlight, August 31, 2012: H3N2v Update: CDC Reports More Cases, Hospitalizations and Nation’s First H3N2v-Associated Death (Minnesota, Ohio, Pennsylvania, Wisconsin)
• Flu Spotlight, August 24, 2012: H3N2v Update: New Cases Reported, Limited Person-to-Person Transmission Detected (Illinois, Maryland, Michigan, Minnesota, Ohio, Pennsylvania, Wisconsin)
• Flu Spotlight, August 17, 2012: H3N2v Outbreaks Update: More H3N2v Cases Reported, Still Linked to Pig Exposure (Illinois, Indiana, Michigan, Ohio, Pennsylvania, West Virginia, Wisconsin)
• MMWR, August 17, 2012: Evaluation of Rapid Influenza Diagnostic Tests for Influenza A (H3N2)v Virus and Updated Case Count — United States, 2012. MMWR 2012; 61(Early Release); 1-3.
• CDC Telebriefing: CDC Update on H3N2v Cases – Thursday, August 9, 2012, 1:00 PM ET
• CDC Telebriefing: Influenza A (H3N2) Variant Virus – Friday, August 3, 2012, Noon ET
• Flu Spotlight, August 2, 2012: CDC Reports Cases 18-29 of H3N2v Virus Infection; Continues to Recommend Interim Precautions When Interacting with Pigs (Hawaii, Ohio, Indiana)
• Flu Spotlight, July 27, 2012: CDC Reports Cases 14-17 of H3N2v Infection; Shares Advice for Safe Fair-Going (Indiana)
• MMWR: July 27, 2012: Notes from the Field: Outbreak of Influenza A (H3N2) Virus Among Persons and Swine at a County Fair — Indiana, July 2012. MMWR 2012; 61(29); 561.
• EID: April 17, 2012: Human Infections with Novel Reassortant Influenza A(H3N2)v Viruses, United States, 2011. EID 2012 May; 18(5)
• MMWR: April 13, 2012: Antibodies Cross-Reactive to Influenza A (H3N2) Variant Virus and Impact of 2010–11 Seasonal Influenza Vaccine on Cross-Reactive Antibodies — United States. MMWR 2012; 61(14); 237-241.
• Flu Spotlight, April 12, 2012: First H3N2 Variant Virus Infection Reported For 2012 (Utah)
• Pathogenesis and transmission of swine origin A(H3N2)v influenza viruses in ferrets. PNAS 2012; 109(10); 3944-3949
• MMWR, January 6, 2012: Update: Influenza A(H3N2)v Transmission and Guidelines—Five States, 2011. MMWR 2011; 60(Early Release); 1-4
• Have You Heard, December 23, 2011: CDC Confirms Detection of A Different Influenza A Variant Virus (Wisconsin)
• Have You Heard, December 9, 2011: CDC confirms two human infections with novel influenza viruses (West Virginia, Minnesota)
• MMWR, December 9, 2011: Update: Influenza Activity – United States, October 2, 2011-November 26, 2011. MMWR 2011; 60(48);1646-1649
• MMWR, December 2, 2011: Limited Human-to-Human Transmission of Novel Influenza A (H3N2) Virus — Iowa, November 2011. MMWR Dispatch 2011; 60(47):1615-1617
• Have You Heard, November 22, 2011: Iowa Reports Novel Influenza Infections in Three Children (Iowa)
• Have You Heard, November 4, 2011: CDC Confirms the 6th and 7th Cases of Swine-Origin Influenza A H3N2 Virus with 2009 H1N1 M Gene (Maine, Indiana)
• Have You Heard, October 21, 2011: CDC Confirms 5th Case of New Swine-Origin H3N2 Reassortant in Maine
• Have You Heard, September 6, 2011: Number of Swine Origin H3 Infections in Pennsylvania Rises to Three
• MMWR, September 9, 2011: Swine-Origin Influenza A (H3N2) Virus Infection in Two Children — Indiana and Pennsylvania, July — August 2011. MMWR 2011; 60 (Early Release); 1-4.
• MMWR, February 18, 2011: Update: Influenza Activity — United States, October 3, 2010-February 5, 2011. MMWR 2011; 60(06):175-181
• MMWR, February 18, 2011: Update: Influenza Activity — United States, October 3, 2010-February 5, 2011. MMWR 2011; 60(06):175-181
• Have You Heard, December 17, 2010: Report of Human Infection with Swine Origin Influenza A (H3N2) (Minnesota)
• Have You Heard, November 12, 2012: Reports of Human Infections with Swine Origin Influenza A (H3N2) (Pennsylvania, Wisconsin)
• NEJM article: “Triple-Reassortant Swine Influenza A (H1) in Humans in the United States, 2005–2009” [262 KB, 10 Pages] Information about 11 cases occurring between 2005 and 2009.